[wolffyx]

It would mean that the tubing was not fully sealed to the driver or the tubing wasnt fully glued to the sound bore or there was a hole in the tubing or, if you are printing tubes, there wasnt good integrity of the tubing through out the shell.

I tested out with some isopropyl alcohol(and some wire to see if it catches somewhere) on the dd to see if there are any leaks from the dd to the nozzle(to the other tubes) and there are 0 leaks. When I added the dumpers(they are added at the nozzle right on the exit) to the EST and Ba's tubes(the tubes are 3d printed) the low freq came back and for testing I removed the EST dumper and then again the low freq is gone(same if I remove the Ba's dumper and let est one instead). From what I did I reached the conclusion that the low freq instead of going into the ear it was escaping trough other tubes(when I tested the EST and ba's are not glued into the case, this might be the issue too, I will test out)

 

[wolffyx]

Here is a picture with how I made the dd have low freq (the tube that has no dumper is the one from the dd) and there is a link with the design https://photos.app.goo.gl/icqNGE6KFffp6asf7

 

[xrecode]

I tested out with some isopropyl alcohol(and some wire to see if it catches somewhere) on the dd to see if there are any leaks from the dd to the nozzle(to the other tubes) and there are 0 leaks. When I added the dumpers(they are added at the nozzle right on the exit) to the EST and Ba's tubes(the tubes are 3d printed) the low freq came back and for testing I removed the EST dumper and then again the low freq is gone(same if I remove the Ba's dumper and let est one instead). From what I did I reached the conclusion that the low freq instead of going into the ear it was escaping trough other tubes(when I tested the EST and ba's are not glued into the case, this might be the issue too, I will test out)

try rewire ur dd with flip polarity (?)

 

[mattmatt]

This is my 4 drivers that i told you guys , i just finished today

look really good! what resin and dye are you using for the white?

 

[wolffyx]

try rewire ur dd with flip polarity (?)

Tried and that didn't help. Tried running them one by one and that still didn't make any difference. Conclusion I must have for both est and ba's a dumper to make the dd have low freq

 

[swtnate]

Tried and that didn't help. Tried running them one by one and that still didn't make any difference. Conclusion I must have for both est and ba's a dumper to make the dd have low freq

That doesnt really track. Something else has to be going on. The DD doesnt require occlusion to produce low frequency. The only way it would escape through tubes is to have a leak or a share sound path. Dampers on a the armatures shouldnt effect the presence of low frequencies.

 

[jcaro]

Tried and that didn't help. Tried running them one by one and that still didn't make any difference. Conclusion I must have for both est and ba's a dumper to make the dd have low freq

What is this tube (I highlighted it in red)? It looks like a vent added to the DD tube to the outside. Solid red line seems to represent a leak to the DD, while the dotted red line is the tube you want sound to follow. I'd try plugging this vent and having a listen.

 

[swtnate]

What is this tube (I highlighted it in red)? It looks like a vent added to the DD tube to the outside. Solid red line seems to represent a leak to the DD, while the dotted red line is the tube you want sound to follow. I'd try plugging this vent and having a listen.

Bingo! OR, add a damper to this tube, probably yellow, and test for an increase in lows. If you see the low end pop-up, you know you will get much more with the hole sealed. That being said, prepare for an increase in back pressure and the potential for ear fatigue.

 

[tonybuild]

Your driver choices, how they're wired, cap values, resistor values, what sound signature you're going for. Maybe I could learn something

Hi again, in this model ( white and wood ) i use sonion 2389D and sonion 38d1 woofer . I wired 5ohm resistor and 22 cap on one of the 2389(no center pad), and 2.2 cap on the other 2389(no center pad) .

On the woofer i wired 20 ohm resister reversed .

2389d,12 mm tube with green damp at 3-4 mm .

Woofer no damp, just smallest tube. 16 mm tube with 1mm ID .

 

[tonybuild]

look really good! what resin and dye are you using for the white?

I mixed Egger with white resin pigment. I bought it in the Michael’s store .

 

[tonybuild]

This is short video of making it.
Dont pay attention on the drivers
On the video . In the beginning, I was experimenting with twfk. But I end up with sonion 2389d

 

[wolffyx]

What is this tube (I highlighted it in red)? It looks like a vent added to the DD tube to the outside. Solid red line seems to represent a leak to the DD, while the dotted red line is the tube you want sound to follow. I'd try plugging this vent and having a listen.

Yes, it is a vent, I added a Red dumber at the end of that vent, and it works very well. For testing purposes I covered all the tubes inculding the vent then I had low freq, then I uncovered one tube from the nozzle and the low freq was gone(without removing the vent cover).

 

[wolffyx]

Bingo! OR, add a damper to this tube, probably yellow, and test for an increase in lows. If you see the low end pop-up, you know you will get much more with the hole sealed. That being said, prepare for an increase in back pressure and the potential for ear fatigue.

I will try with yellow too, to se what will happen but if I am not using dumpers to the other tubes the DD will still don't have low freq.

 

[jcaro]

Yes, it is a vent, I added a Red dumber at the end of that vent, and it works very well. For testing purposes I covered all the tubes inculding the vent then I had low freq, then I uncovered one tube from the nozzle and the low freq was gone(without removing the vent cover).

Definitely sounds like a bass leak through one or more of your other tubes as well, in that case. This is why adding dampers to the BA's helps - the dampers limit how much bass can escape through the BA sound tubes.
I'd leave the DD vent closed and check two more things: are the BA's sealed against their tube entrance holes (to prevent leaks around the nozzle)? Is the entire earpiece closed and well sealed, or is it open to the outside air?

 

[wolffyx]

Hey guys,
Thanks for all the help!

Coming back with the final product:
Left CIEM 5BA's(destroyed one while soldering, it will be changed in near feature) 4EST and one DD and a green dumber for the BA's
Right CIEM 6 BA's 4 EST one DD.
As a crossover I have a low pass, high pass and a band pass for one of the ba's.
It still need to do some small adjustments but for now I am happy with the result(had an eq on and because of that I had that bass, the CIEMs still have bass without EQ)